Biohacker approved

CAROL Bike: the cardio of choice for Dave Asprey

Dave Asprey names CAROL Bike as the ultimate cardiovascular exercise hack in his book Smarter Not Harder. CAROL isn’t just the smartest, most efficient exercise bike he’s tried—it’s the world's only home REHIT exercise bike. Delivering the same results as a 45-minute run—in just 5.

Get $300 off with code BIOHACKING26. Offer ends June 30th.

“This is real. You’re spending 90% less time on CAROL Bike and it gives you superior results compared to traditional exercise.”

Dave Asprey

Bulletproof and Upgrade Labs founder

Maximum results. Minimal time.

CAROL Bike's short, efficient workouts are scientifically proven to get you superior health and fitness benefits compared to regular exercise—in 90% less time.

Get fitter

Improve your VO₂max by 12%—in just 8 weeks.

Live younger

Improving your VO₂max by 12% is like turning the clock back on your age by 10 years.

Live healthier

Reduce your risk of type 2 diabetes by 62%—and blood pressure by 5%.

Save time

Get all the benefits of a 45-minute run in just 5.

Short. Smart. Scientific.

5 minutes, 3x a week. CAROL Bike workouts are scientifically proven to be the most efficient cardio workout—and so easy to fit into your routine. Giving you back time for the things that matter most.

You’ll find CAROL Bikes at all of Dave Asprey’s Upgrade Labs, which are the world’s first Human Upgrade Centers.

What makes CAROL Bike special?

REHIT and AI-personalization make CAROL Bike unique. Just 2x20-second sprints create the most powerful training stimulus. Giving you by far the most efficient intervention to increase your cardio fitness. Learn more from our CEO and co-founder in the video below.

Unlock the future of fitness

CAROL Bike's short, AI-personalized programs are designed to get you fitter, faster.
It's the ultimate fitness tool for anyone seeking better results in less time.

The shortest, most efficient workouts

Our signature REHIT workout creates the most potent training stimulus with just 2x20-second sprints. It’s scientifically proven to deliver superior health and fitness benefits compared to regular exercise—in 90% less time.

Personalized to your fitness and goals

CAROL Bike's AI-personalization means it's suitable for any age and any fitness level. Our AI learns to push you to your limit, applying automatic and instant resistance to ensure your workouts are most effective for you.

Significant results in just 8 weeks

CAROL Bike is scientifically proven to improve your cardio fitness by 12%—in just 8 weeks. That's like turning the clock back on your age by 10 years.

22 workouts and counting

Developed with leading exercise researchers and scientists, CAROL Bike’s range of scientifically-proven workouts make it the world’s most effective exercise bike.

Listen to Dave's podcast with Ulrich Dempfle, CEO and co-founder at CAROL

Dave Asprey talks with CAROL CEO and co-founder, Ulrich Dempfle, about the scientifically proven benefits of CAROL Bike.

“It’s the rapid onset of glycogen depletion that makes the difference. So it’s exactly that slope of the curve that releases the signaling molecules that tells your body it has to get fitter and stronger.” – Ulrich Dempfle, CAROL CEO

Order your CAROL Bike today

4.6/5 | 30,000+ riders

Experience the shortest, most efficient workouts—
backed by science.

Includes:

100-day risk-free home trial
Free delivery option
0% APR financing option
5-year frame warranty
1x free heart rate chest belt

~~$2,595~~ $2,345 with code BIOHACKING25

Read our reviews on Trustpilot

Read real reviews from riders who’ve experienced CAROL’s benefits themselves.

Shauna Murphy

"Exercising smarter with CAROL is improving my health week after week. The AI personalization takes any guesswork out of my workouts, so I continue to be challenged and exceed my goals. I am a powerful example of CAROL Bike’s effectiveness!"

Joel Evan

"The most significant barrier for me and my busy clients is TIME, and CAROL removes that; in just 5-10 minutes, you get a cardio workout equivalent to 45 mins. Absolute game-changer!”

Andrea Miller

“CAROL has been a game changer for me. The REHIT Intense ride is revolutionary in the fitness realm. It’s the most effective way to get the fittest, the fastest.”

Everett Myers

“This will help anyone get into the habit of exercising and will also support high performance athletes in reaching higher levels of strength and fitness. I recommend the purchase of CAROL without any hesitation!”

Gabriela Moreno

“The transformative impact on how my body feels has made CAROL my undisputed go-to for cardio workouts. As a sports medicine practitioner, I highly recommend it.”

Loved by our community of 30,000+ riders

Hear how our community of real riders, fitness thought-leaders, and self-optimizers make the most of every workout with CAROL Bike.

“I love my CAROL Bike!”

Performance psychologist Dr. Michael Gervais.

1 MIN READ

“My go-to solution for keeping healthy.”

Hear how busy entrepreneur and Holistic Weight Loss coach, Joel Evan, keeps fit and healthy using CAROL Bike.

1 MIN READ

Benefits of a 45-minute run—in just 5

Hear from Human Performance Consultant Ben Greenfield, on the habit of working out.

1 MIN READ

“Most Innovative Exercise Bike 2022”

As awarded by Garage Gym Reviews, the #1 trusted home gym equipment review site.

1 MIN READ

Defying age, defining fitness: Andrea’s CAROL journey

Discover how Andrea Miller shattered fitness norms at 55 with CAROL Bike.

3 MIN READ

"A groundbreaking piece of exercise equipment."

Good habits start
here

Order CAROL Bike now, try it for yourself—and build a habit that lasts.

Save $250

Use code BIOHACKING25 at checkout to save $250 off your CAROL Bike purchase.

100-Day Home Trial

Try CAROL Bike at home for 100 days. And if it’s not for you, return it and get a refund.

Free Delivery

If you live in the mainland US or Canada, get your new CAROL Bike delivered for free.

0% APR Financing

You can buy your CAROL Bike with Affirm and pay monthly for 12 months at 0% APR.

CAROL Bike: the cardio of choice for Dave Asprey